Re: portable GPS does not work in my TCH
my1stHybrid - I've been using an Alpine "Blackbird" portable GPS system in my TCH for some months now, and it generally seems to receive the satellites (up to as many as 12) successfully through the windshield. I've placed mine in what sounds like the same location as yours - at the center top of the dash, right by the air vent housing. I don't find any need to install an external antenna, although the Blackbird can accept one.
Stan
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